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What is the main difference between GSM & CDMA?
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Answer Posted / sandhya
what is
the difference between GSM and CDMA, the two leading technologies?
Both GSM (Global System for Mobile Communications) and CDMA (Code
Division Multiple Access) are technologies that work on radio
frequencies, with the mobile phone handset being the antennae receiving
the signal. The range of each technology is different, and they also
have different rates and modulation schemes, and that is why handsets
are different between the two technologies. GSM uses SIM cards
(Subscriber Identity Module) whereas, CDMA based phones do not. In the
case of GSM networks, it is the SIM card that is tied to the network,
where on CDMA networks it is the handset itself that is linked to the
carrier. This means that a SIM card can be placed in pretty much any
handset and still receive GSM coverage, but once a CDMA phone's
subscription has ended, the phone is outmoded. CDMA technology has a
version of the SIM card, the RUIM (Removable User Identity Module) but
is not as widely popular in the US because it is the handsets which
must be linked to the carrier.
| Is This Answer Correct ? | 17 Yes | 7 No |
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